SandorR
Student
- Dec 17, 2020
- 17
Hello all,
I have some material from a textbook that explains the purpose of providing minimum shear reinforcement to concrete beams.
The textbook says:
"The minimum shear reinforcement is provided for the following:
(i) Any sudden failure of beams is prevented if concrete cover bursts
and the bond to the tension steel is lost.
(ii) Brittle shear failure is arrested which would have occurred without
shear reinforcement.
(iii) Tension failure is prevented which would have occurred due to
shrinkage, thermal stresses and internal cracking in beams.
(iv) To hold the reinforcement in place when concrete is poured.
(v) Section becomes effective with the tie effect of the compression
steel."
I have hard time understanding points (i) and (v).
For point (i), how does shear reinforcement (stirrups) prevent sudden failure if bond to the tension steel is lost? If bond to tension steel is lost, I would see that the longitudinal reinforcement no longer functions properly. But how does shear reinforcement help in such a case?
Point (v) - what could this mean? What does it mean exactly that section becomes effective with the tie effect of compression steel?
Thank you very much in advance!
I have some material from a textbook that explains the purpose of providing minimum shear reinforcement to concrete beams.
The textbook says:
"The minimum shear reinforcement is provided for the following:
(i) Any sudden failure of beams is prevented if concrete cover bursts
and the bond to the tension steel is lost.
(ii) Brittle shear failure is arrested which would have occurred without
shear reinforcement.
(iii) Tension failure is prevented which would have occurred due to
shrinkage, thermal stresses and internal cracking in beams.
(iv) To hold the reinforcement in place when concrete is poured.
(v) Section becomes effective with the tie effect of the compression
steel."
I have hard time understanding points (i) and (v).
For point (i), how does shear reinforcement (stirrups) prevent sudden failure if bond to the tension steel is lost? If bond to tension steel is lost, I would see that the longitudinal reinforcement no longer functions properly. But how does shear reinforcement help in such a case?
Point (v) - what could this mean? What does it mean exactly that section becomes effective with the tie effect of compression steel?
Thank you very much in advance!
